English to Polish Tech/Engineering Electronics / Elect Eng

"Look into the void between the inner skirt and the outer bore of Stator.
Check for an accumulation of more than 3 mm of any of these types of materials: sand, goldfish stones, gravel, kitty litter, glass, etc."

Nie bardzo rozumiem, gdzie te odpadki miałyby się zbierać. Tekst dotyczy pompy kanalizacji.

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